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authorHaren Myneni <haren@linux.vnet.ibm.com>2012-12-06 21:50:32 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-01-10 17:01:10 +1100
commit13e7a8e846c2ea38a552b986ea49332f965bbb7a (patch)
treeaf3d31b309222fbe23106740abff9418169d1cc3 /arch/powerpc/include/asm/ppc_asm.h
parent92779245599bb3d7fb48066b11c4bfd6aa477198 (diff)
downloadvexpress-lsk-13e7a8e846c2ea38a552b986ea49332f965bbb7a.tar.gz
powerpc: Macros for saving/restore PPR
[PATCH 5/6] powerpc: Macros for saving/restore PPR Several macros are defined for saving and restore user defined PPR value. Signed-off-by: Haren Myneni <haren@us.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/ppc_asm.h')
-rw-r--r--arch/powerpc/include/asm/ppc_asm.h25
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
index 376e36d707f..c2d0e58aba3 100644
--- a/arch/powerpc/include/asm/ppc_asm.h
+++ b/arch/powerpc/include/asm/ppc_asm.h
@@ -389,6 +389,31 @@ END_FTR_SECTION_IFCLR(CPU_FTR_601)
FTR_SECTION_ELSE_NESTED(848); \
mtocrf (FXM), RS; \
ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_NOEXECUTE, 848)
+
+/*
+ * PPR restore macros used in entry_64.S
+ * Used for P7 or later processors
+ */
+#define HMT_MEDIUM_LOW_HAS_PPR \
+BEGIN_FTR_SECTION_NESTED(944) \
+ HMT_MEDIUM_LOW; \
+END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,944)
+
+#define SET_DEFAULT_THREAD_PPR(ra, rb) \
+BEGIN_FTR_SECTION_NESTED(945) \
+ lis ra,INIT_PPR@highest; /* default ppr=3 */ \
+ ld rb,PACACURRENT(r13); \
+ sldi ra,ra,32; /* 11- 13 bits are used for ppr */ \
+ std ra,TASKTHREADPPR(rb); \
+END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,945)
+
+#define RESTORE_PPR(ra, rb) \
+BEGIN_FTR_SECTION_NESTED(946) \
+ ld ra,PACACURRENT(r13); \
+ ld rb,TASKTHREADPPR(ra); \
+ mtspr SPRN_PPR,rb; /* Restore PPR */ \
+END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,946)
+
#endif
/*